Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781721014507
Category :
Languages : en
Pages : 60
Book Description
This is the final report discussing the work done for the Space Environments and Effects (SEE) Program. It discusses test chamber design, coating research, and test results on electrically thermal control coatings. These thermal control coatings are being developed to have several orders of magnitude higher electrical conductivity than most available thermal control coatings. Most current coatings tend to have a range in surface resistivity from 1,011 to 1,013 ohms/sq. Historically, spacecraft have had thermal control surfaces composed of dielectric materials of either polymers (paints and metalized films) or glasses (ceramic paints and optical solar reflectors). Very seldom has the thermal control surface of a spacecraft been a metal where the surface would be intrinsically electrically conductive. The poor thermal optical properties of most metals have, in most cases, stopped them from being used as a thermal control surface. Metals low infrared emittance (generally considered poor for thermal control surfaces) and/or solar absorptance, have resulted in the use of various dielectric coatings or films being applied over the substrate materials in order to obtain the required optical properties.Mell, R. J. and Wertz, G. E. and Edwards, D. L. (Technical Monitor)Marshall Space Flight CenterCONTROL SURFACES; ELECTRICAL RESISTIVITY; TEMPERATURE CONTROL; THERMAL CONTROL COATINGS; DIELECTRICS; CERAMICS
Testing and Optimization of Electrically Conductive Spacecraft Coatings
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781723894626
Category :
Languages : en
Pages : 62
Book Description
This is the final report discussing the work done for the Space Environments and Effects (SEE) Program. It discusses test chamber design, coating research, and test results on electrically thermal control coatings. These thermal control coatings are being developed to have several orders of magnitude higher electrical conductivity than most available thermal control coatings. Most current coatings tend to have a range in surface resistivity from 1,011 to 1,013 ohms/sq. Historically, spacecraft have had thermal control surfaces composed of dielectric materials of either polymers (paints and metalized films) or glasses (ceramic paints and optical solar reflectors). Very seldom has the thermal control surface of a spacecraft been a metal where the surface would be intrinsically electrically conductive. The poor thermal optical properties of most metals have, in most cases, stopped them from being used as a thermal control surface. Metals low infrared emittance (generally considered poor for thermal control surfaces) and/or solar absorptance, have resulted in the use of various dielectric coatings or films being applied over the substrate materials in order to obtain the required optical properties.Mell, R. J. and Wertz, G. E. and Edwards, D. L. (Technical Monitor)Marshall Space Flight CenterCONTROL SURFACES; ELECTRICAL RESISTIVITY; TEMPERATURE CONTROL; THERMAL CONTROL COATINGS; DIELECTRICS; CERAMICS
Publisher: Independently Published
ISBN: 9781723894626
Category :
Languages : en
Pages : 62
Book Description
This is the final report discussing the work done for the Space Environments and Effects (SEE) Program. It discusses test chamber design, coating research, and test results on electrically thermal control coatings. These thermal control coatings are being developed to have several orders of magnitude higher electrical conductivity than most available thermal control coatings. Most current coatings tend to have a range in surface resistivity from 1,011 to 1,013 ohms/sq. Historically, spacecraft have had thermal control surfaces composed of dielectric materials of either polymers (paints and metalized films) or glasses (ceramic paints and optical solar reflectors). Very seldom has the thermal control surface of a spacecraft been a metal where the surface would be intrinsically electrically conductive. The poor thermal optical properties of most metals have, in most cases, stopped them from being used as a thermal control surface. Metals low infrared emittance (generally considered poor for thermal control surfaces) and/or solar absorptance, have resulted in the use of various dielectric coatings or films being applied over the substrate materials in order to obtain the required optical properties.Mell, R. J. and Wertz, G. E. and Edwards, D. L. (Technical Monitor)Marshall Space Flight CenterCONTROL SURFACES; ELECTRICAL RESISTIVITY; TEMPERATURE CONTROL; THERMAL CONTROL COATINGS; DIELECTRICS; CERAMICS
Testing and Optimization of Electrically Conductive Spacecraft Coatings Final Report ... Nasa
Author: United States. National Aeronautics and Space Administration
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Testing and Optimization of Electrically Conductive Spacecraft Coatings
Author: R. J. Mell
Publisher:
ISBN:
Category : Protective coatings
Languages : en
Pages : 64
Book Description
Publisher:
ISBN:
Category : Protective coatings
Languages : en
Pages : 64
Book Description
Formulation of Electrically Conductive Thermal-control Coatings
Author: Michael C. Shai
Publisher:
ISBN:
Category : Coatings
Languages : en
Pages : 30
Book Description
Publisher:
ISBN:
Category : Coatings
Languages : en
Pages : 30
Book Description
Solar Absorptance and Thermal Emittance of Some Common Spacecraft Thermal-control Coatings
Author: John H. Henninger
Publisher:
ISBN:
Category : Space vehicles
Languages : en
Pages : 56
Book Description
Publisher:
ISBN:
Category : Space vehicles
Languages : en
Pages : 56
Book Description
Optimization of Thermal Control Coatings for Cylindrical Spacecraft
Author: Roger D. Casagrande
Publisher:
ISBN:
Category :
Languages : en
Pages : 184
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 184
Book Description
Microsample Characterization of Coatings for Grcop-84 for High Heat Flux Applications
Author: National Aeronautics and Space Adm Nasa
Publisher:
ISBN: 9781724191816
Category :
Languages : en
Pages : 26
Book Description
A multidisciplinary Johns Hopkins University-NASA Glenn team is undertaking a collaborative research program to elucidate and model the thermal stability and mechanical integrity of candidate coatings for GRCop-84. GRCop-84 is a high conductivity, high strength copper alloy that was recently developed at NASA Glenn for use in high temperature, high heat flux applications. With potential applications in rocket motor combustion chamber liners, nozzle ramps and other actively cooled structures, this new material offers great potential for decreasing weight and increasing reliability of third generation reusable launch vehicles. Current emphasis has turned toward the development of environmentally resistant and thermal barrier coatings for this alloy. Metallic coatings such as NiCrAlY and Cu-8-30%Cr have shown promise in: prohibiting blanching, reducing dog-house failures, increasing operating temperatures and decreasing cooling requirements. The focus of this research program is to develop a fundamental understanding of the substrate-coating interactions that occur during thermal cycling (inter-diffusion, viscoplasticity, morphological evolution, crack formation, etc.) and to derive a science-based protocol for future coating selection, optimization and reliability assurance. The microsample tensile testing approach adopted for this study allows us to characterize small-scale and highly scale-specific coatings and properties in a way not possible by conventional means. In addition to providing much needed design data, the integration of microsample testing with detailed microstructural observations provides a mechanistic foundation for coating optimization and life prediction modeling. Hemker, Kevin Glenn Research Center NASA/CR-2003-212200, E-13803, NAS 1.26:212200...
Publisher:
ISBN: 9781724191816
Category :
Languages : en
Pages : 26
Book Description
A multidisciplinary Johns Hopkins University-NASA Glenn team is undertaking a collaborative research program to elucidate and model the thermal stability and mechanical integrity of candidate coatings for GRCop-84. GRCop-84 is a high conductivity, high strength copper alloy that was recently developed at NASA Glenn for use in high temperature, high heat flux applications. With potential applications in rocket motor combustion chamber liners, nozzle ramps and other actively cooled structures, this new material offers great potential for decreasing weight and increasing reliability of third generation reusable launch vehicles. Current emphasis has turned toward the development of environmentally resistant and thermal barrier coatings for this alloy. Metallic coatings such as NiCrAlY and Cu-8-30%Cr have shown promise in: prohibiting blanching, reducing dog-house failures, increasing operating temperatures and decreasing cooling requirements. The focus of this research program is to develop a fundamental understanding of the substrate-coating interactions that occur during thermal cycling (inter-diffusion, viscoplasticity, morphological evolution, crack formation, etc.) and to derive a science-based protocol for future coating selection, optimization and reliability assurance. The microsample tensile testing approach adopted for this study allows us to characterize small-scale and highly scale-specific coatings and properties in a way not possible by conventional means. In addition to providing much needed design data, the integration of microsample testing with detailed microstructural observations provides a mechanistic foundation for coating optimization and life prediction modeling. Hemker, Kevin Glenn Research Center NASA/CR-2003-212200, E-13803, NAS 1.26:212200...
AIAA Aerospace Sciences Meeting and Exhibit, 42nd
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 620
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 620
Book Description
Technology for Large Space Systems
Author:
Publisher:
ISBN:
Category : Large space structures (Astronautics)
Languages : en
Pages : 280
Book Description
Publisher:
ISBN:
Category : Large space structures (Astronautics)
Languages : en
Pages : 280
Book Description
Photonics for Space Environments
Author:
Publisher:
ISBN:
Category : Photonics
Languages : en
Pages : 196
Book Description
Publisher:
ISBN:
Category : Photonics
Languages : en
Pages : 196
Book Description